Question

A sample with a mean of M = 8 has EX = 56. How many scores are in the sample?

The number of scores is n =

Answer 1

`n = 7`

Explanation:

Given

`\bar x = 8` --- the mean

`\sum x = 56` --- sum of scores

Required

The number of scores (n)

This is calculated as:

`\bar x = (\sum x)/(n)`

Make n the subject

`n = (\sum x)/(\bar x)`

`n = (56)/(8)`

`n = 7`